Speech recognition using unequally-weighted subvector error measures for determining a codebook vector index to represent plural speech parameters
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United States of America Patent
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May 14, 2002
Grant Date -
N/A
app pub date -
Oct 13, 1999
filing date -
Oct 13, 1998
priority date (Note) -
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Abstract
Quantization unit (108) comprises evaluator (120) and comparator (122) in signal processing for identifying an utterance in system (100). The evaluator (120) weights a first intermediate result of an operation on a first set of a plurality of speech parameters (104) differently than a second intermediate result of an operation on a second set of the plurality of speech parameters (104) in a weighted representation of the plurality of speech parameters (104). The comparator (122) employs the weighted representation of the plurality of speech parameters (104) to determine a vector index to represent the plurality of speech parameters (104). The quantization unit (108), in one example, can employ split vector quantization in conjunction with the weighted representation to determine a vector index to represent the plurality of speech parameters (104).
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